6665420 has 12 divisors (see below), whose sum is σ = 13997424. Its totient is φ = 2666160.

The previous prime is 6665413. The next prime is 6665437. The reversal of 6665420 is 245666.

6665420 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166616 + ... + 166655.

It is an arithmetic number, because the mean of its divisors is an integer number (1166452).

Almost surely, 2^6665420 is an apocalyptic number.

It is an amenable number.

6665420 is an abundant number, since it is smaller than the sum of its proper divisors (7332004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6665420 is a wasteful number, since it uses less digits than its factorization.

6665420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333280 (or 333278 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 6665420 is about 2581.7474702224. The cubic root of 6665420 is about 188.1954734624.

The spelling of 6665420 in words is "six million, six hundred sixty-five thousand, four hundred twenty".